Figure 3
From: Improving magnetic resonance imaging with smart and thin metasurfaces
MRI results for homogeneous phantom scans. The SNR in slice# 4 is shown for a flip angle of \(70\,\)deg (approx. Ernst angle) with Rx by (a) the SLC, (b) the body coil, (c) body coil + EP1, and (d) body coil + EP2. The SNR in the two ROIs is indicated, respectively. (e) Photo of the two EPs. The insets show the elements that are responsible for detuning in Tx. f) The normalized SNR enhancement (w.r.t. the body coil) in slice# 4 on a central vertical line, see Fig. 2. At a certain distance, the EPs outperform the SLC. Either EP leads to a sixfold increase in SNR close to the surface, which falls off almost linearly in contrast to the SLC’s exponential behavior.
